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From: Juri Lelli <juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Xuewen Yan <xuewen.yan94-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Qais Yousef <qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>,
	Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Zefan Li <lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>,
	Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
	Hao Luo <haoluo-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Dietmar Eggemann <dietmar.eggemann-5wv7dgnIgG8@public.gmane.org>,
	Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	luca.abeni-5rdYK369eBLQB0XuIGIEkQ@public.gmane.org,
	claudio-YOzL5CV4y4YG1A2ADO40+w@public.gmane.org,
	tommaso.cucinotta-5rdYK369eBLQB0XuIGIEkQ@public.gmane.org,
	bristot-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Vincent Guittot
	<vincent.guittot-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Wei Wang <wvw-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Rick Yiu <rickyiu-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Quentin Perret <qperret-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Heiko Carstens <hca-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
	Vasily Gorbik <gor-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>
Subject: Re: [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex
Date: Thu, 27 Apr 2023 07:53:27 +0200	[thread overview]
Message-ID: <ZEoN1wq47uhE201p@localhost.localdomain> (raw)
In-Reply-To: <CAB8ipk-ns=d+jNkKi1sjkSQmQidziCj34COkHZt6ZkRiG47HHA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

Hi,

On 27/04/23 10:58, Xuewen Yan wrote:
> HI Juri,
> 
> Would this patch be merged tobe stable-rc? In kernel5.15, we also find
> that the rwsem would be blocked for a long  time, when we change the
> task's cpuset cgroup.
> And when we revert to the mutex, the delay would disappear.

Honestly, I'm not sure. This change is mostly improving performance, but
it is also true that it's fixing some priority inheritance corner cases.
So, I'm not sure it qualifies for stable, but it would be probably good to
have it there.

Thanks,
Juri


  parent reply	other threads:[~2023-04-27  5:53 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-29 12:55 [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Juri Lelli
2023-03-29 12:55 ` [PATCH 3/6] sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets Juri Lelli
     [not found]   ` <20230329125558.255239-4-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-04 20:06     ` Qais Yousef
2023-10-09 11:43   ` Xia Fukun
2023-10-09 15:26     ` Waiman Long
     [not found] ` <20230329125558.255239-1-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-29 12:55   ` [PATCH 1/6] cgroup/cpuset: Rename functions dealing with DEADLINE accounting Juri Lelli
2023-04-04 20:05     ` Qais Yousef
2023-03-29 12:55   ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Juri Lelli
     [not found]     ` <20230329125558.255239-3-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-04 17:31       ` Waiman Long
     [not found]         ` <fa585497-5c6d-f0ed-bdda-c71a81d315ad-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-26 11:57           ` Juri Lelli
2023-04-26 14:05             ` Waiman Long
     [not found]               ` <d53a8af3-46e7-fe6e-5cdd-0421796f80d2-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-27  2:58                 ` Xuewen Yan
     [not found]                   ` <CAB8ipk-ns=d+jNkKi1sjkSQmQidziCj34COkHZt6ZkRiG47HHA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-04-27  5:53                     ` Juri Lelli [this message]
     [not found]                       ` <ZEoN1wq47uhE201p-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2023-04-27 11:50                         ` Xuewen Yan
2023-04-28 11:22                         ` Qais Yousef
2023-04-26 14:31             ` Daniel Bristot de Oliveira
2023-04-04 20:05       ` Qais Yousef
2023-03-29 12:55   ` [PATCH 4/6] sched/deadline: Create DL BW alloc, free & check overflow interface Juri Lelli
     [not found]     ` <20230329125558.255239-5-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-29 14:24       ` Waiman Long
2023-03-29 12:55   ` [PATCH 5/6] cgroup/cpuset: Free DL BW in case can_attach() fails Juri Lelli
2023-03-29 14:25     ` Waiman Long
     [not found]       ` <f8dfc30b-5079-2f44-7ab1-42ac25bd48b7-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-29 14:31         ` Waiman Long
     [not found]           ` <f8baea06-eeda-439a-3699-1cad7cde659e-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-29 16:39             ` Dietmar Eggemann
     [not found]               ` <cdede77a-5dc5-8933-a444-a2046b074b12-5wv7dgnIgG8@public.gmane.org>
2023-03-29 18:09                 ` Waiman Long
     [not found]                   ` <b7ad39b1-c615-3ebc-6980-d9db0f2ab0a0-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-30 15:14                     ` Dietmar Eggemann
     [not found]                       ` <5ff103f9-1366-0a9b-bd97-419ced1de07f-5wv7dgnIgG8@public.gmane.org>
2023-03-30 16:13                         ` Waiman Long
2023-03-29 12:55   ` [PATCH 6/6] cgroup/cpuset: Iterate only if DEADLINE tasks are present Juri Lelli
     [not found]     ` <20230329125558.255239-7-juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-04 20:06       ` Qais Yousef
2023-04-26 11:58         ` Juri Lelli
2023-03-29 14:34   ` [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Waiman Long
2023-03-29 16:02   ` [PATCH 6/7] cgroup/cpuset: Protect DL BW data against parallel cpuset_attach() Waiman Long
2023-03-29 16:05     ` Waiman Long
     [not found]     ` <20230329160240.2093277-1-longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-03-30 13:34       ` Dietmar Eggemann
2023-04-04 20:09   ` [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Qais Yousef
2023-04-18 14:11   ` Qais Yousef
2023-04-18 14:31     ` Waiman Long
     [not found]       ` <eda74c03-bde2-bb51-2b0d-df2097215696-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2023-04-20 14:15         ` Juri Lelli
  -- strict thread matches above, loose matches on Subject: below --
2023-08-20 15:21 [PATCH 0/6] Backport rework of deadline bandwidth restoration for 5.10.y Qais Yousef
     [not found] ` <20230820152144.517461-1-qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>
2023-08-20 15:21   ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Qais Yousef
2023-08-20 15:22 [PATCH 0/6] Backport rework of deadline bandwidth restoration for 5.15.y Qais Yousef
2023-08-20 15:22 ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Qais Yousef
2023-08-20 15:24 [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.1.y Qais Yousef
2023-08-20 15:24 ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Qais Yousef
2023-08-21 22:19 [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.4.y Qais Yousef
2023-08-21 22:19 ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Qais Yousef

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